Scott Ultra Carbon RC: First Run Review of Scott's First Carbon Trail Shoe

Introduction

Scott’s road debut, the Speed Carbon RC, made a solid first impression, so the brand’s first carbon-plated trail shoe has been one to watch. The Ultra Carbon RC is pitched squarely at ultra-distance trail racing, and this first run put it through a proper test: a planned 10K that turned into 10 miles on wet, muddy and slippy woodland trails.

Before running, there were reasons for both optimism and doubt. The carbon plate story is genuinely interesting, but the weight figure raised eyebrows, and the outsole looked under-spec for the conditions waiting outside. Here is how it all stacked up.

The Stats and Spec at a Glance

Scott asks a premium price for this shoe: it retails at £210 in the UK, which is consistent with what carbon-plated running shoes command. What was more surprising was the weight. For a shoe aimed at ultra racing, it comes in at a hefty 341 grams in a UK 9.5, much heavier than expected for this category.

The midsole stack runs a 5mm offset with 25mm under the heel and 20mm under the forefoot. Scott describes the Ultra Carbon RC as one of its most technically advanced trail shoes to date, and most of that development centres on the carbon-plated midsole.

Construction: Carbon Plate, Kinetic Light Foam and the Ultra Outsole

The midsole pairs a generous dose of Scott’s Kinetic Light foam, designed to feel light and cushioned while keeping performance and comfort over long distances, with a carbon plate that has a genuinely unique trick. Scott claims the plate’s behaviour adapts to effort: run faster and it should feel stiff and rigid for forward momentum, while on more technical trails where pace drops, it should soften up and feel more flexible, keeping the shoe nimble and connected underfoot.

Underneath sits Scott’s new Ultra outsole, and it is not the most aggressive lug pattern around. Measured lug depth sits at roughly 3 to 3.5mm, and Scott itself positions this outsole as best suited to fast, smooth summer trails at any distance. On the upper, a twin-layer engineered mesh with fine perforations aims at breathability, with TPU overlays wrapping the heel, midfoot lace eyelets and toe box for structure and durability. The gusseted tongue is thin with minimal padding, though the ankle collar and heel cup carry more cushioning in a fairly stiff, structured shell. It all arrives in Scott’s familiar black and high-visibility yellow.

Fit, Comfort and the Upper

The Ultra Carbon RC fits true to size, consistent with other Scott running shoes, with a secure hold around the midfoot and good toe box length. There is very slight slippage in the heel cup out of the box, but tightening the laces from the bottom up solved it entirely and delivered a firm lockdown.

Concerns about the thin, lightly padded tongue proved unfounded. It felt comfortable across the top of the foot, and the structured heel and collar gave a well-supported fit that suited the foot shape well straight out of the box.

First Run: Wet, Muddy and Thoroughly Tested

The trails were soaked after days of rain, and the outsole was the main pre-run worry given those shallow lugs. In reality, it performed better than expected. Traction held up well on wet leaves, wet roots, gravelly trail and even some muddy sections. Only in deep, boggy mud did grip genuinely fall away.

On flatter, faster woodland sections the shoe came alive, and that is exactly where it felt designed to shine. The geometry and plate felt noticeably more efficient there than on trickier ground. The Kinetic Light foam read slightly firmer than expected for a race-day shoe and felt similar in character to the road-focused Speed Carbon RC, though it did not return quite as much energy as hoped. That could change as the midsole beds in over more miles.

The weight, too, runs a little lighter on the foot than the 341-gram figure suggests, but much of the mass sits in the midsole, and the balance feels slightly bottom-heavy rather than nimble.

Things to Consider Before Buying

This is a shoe built for dry, fast, flowing trails, and in that environment it looks like a genuinely efficient option. In wet, deep mud, the shallow outsole is a real limitation and buyers should go in knowing it.

Weight is the other consideration. For a carbon-plated ultra race shoe, closer to 300 grams or just under would feel more appropriate, and the ride leans toward a comfortable daily trainer rather than a lively, racy one. The overall feel is comparable to the Adidas Ultraboe tested late last year, with similar midsole weight and ride, though the Ultra Carbon RC’s upper is notably more comfortable.

Buying Advice

If your racing and training happen mostly on smooth, firm, dry trails and you want a well-fitting, comfortable carbon-plated option for long distances, the Ultra Carbon RC deserves a look at £210. If your routes include technical, muddy or very wet terrain, the shallow lugs will hold it back, and riders wanting a springy, energetic carbon-plated ride may find the midsole a touch muted on first run. More miles should clarify whether the foam livens up as it beds in.

Conclusion

As a first run, the Scott Ultra Carbon RC was a mixed bag: the outsole comfortably outperformed expectations in challenging wet conditions, the upper fits beautifully and locked down securely once the laces were set, and the shoe ran well enough to turn a planned 10K into 10 miles. But for a carbon-plated race-day trail shoe, the weight, the slightly bottom-heavy balance and the somewhat muted midsole energy return leave room for improvement. More miles will tell whether it settles into something more dynamic.